Fog-signal



Patented Nov. 29, |898.

W. T. PURCHASE.

FUG S l G N L, (Application filed July 9., 189B.)

(No Model.)

NITED STATES PATENT FFIC,

WILLIAM T. PURCHASE, OF BOSTON, MASSAOI-IUSETTS.v

FOG-SIGNAL. i

SPECIFICATION forming part of Letters Patent No. 615,228, dated November29, 1898. Application filed July 9, 1898. Serial No. 685,527. (Nomodel.)

To all whom, it may concern:

Beit known that I, lWILLIAM T. PURCHASE, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Fog-Signals; and I hereby declare that the following isa full, clear, and exact description of the same, reference being had tothe accompanying drawings, forming part of this specification.

This invention has reference to improvements in fog-signals, andparticularly in the means for supporting the operating mechanism.

The object of the invention is to improve the construction of themechanism whereby the air is collected and is forced through the hornunder pressure.

Another object is to provide a substantial support for the bellows andfor the mechanism whereby the bellows are operated.

The invention consists of the central standard having the air-channelstogether with the bellows and air-chamber mounted thereon.

The invention also consists in the central standard having anair-channel connecting each side with the front anda channel from thefront to the back, bellows at the sides of the standard, apressure-chamber at the front thereof and covering the three channels,and a fog-'horn connected with the last or outlet channel, together withthe operating mechanism for the bellows mounted at the upper portion ofthe standard.

The invention also consists in such other novel features of constructionand `combination of parts as shall. hereinafter be more fully described,and pointed out in the claims.

Figure 1 represents a perspective view of the improved fog-signal withincased operating mechanism, portions of the case being broken away.Fig. 2 represents a front view of the mechanism removed from the case.Fig. 3 represents a rear elevation, part of the staindard being brokenaway to show the channe s.

Similar numbers of reference designate corresponding parts throughout.

In carrying my invention into practice it has been my object to soconstruct the operating mechanism that the bellows should besubstantially supported and to further improve the construction of themechanism.

In the'drawings, 5 indicates a box orprotective casing. The upper partof the box front has an opening 6 for the passage of theoperating-shaft, and the back of the box has an opening through whichthe horn connection may enter the air-supply channel in the standard.The box may also have a hinged cover 7. the standard 8, whichl has theextension 9 9 at its upper end. In the body of the standard are formedthe channels 10 and 11, each of which connects one side of the standardwith the front thereof. At the lowerportion the supply-channel 12extends through the standard from front to' back. To the sides ofthestandard, over theends of the respective channels 10 and 11, are securedthe bellows 13 and 14, which are of the usual construction, having inletvalves and being hinged at their lower ends to the standard, so thatthey may be operated from the top. To the front of the standard, overthe ends of the channels 10, 11, and 12, is secured the expansibleair-chamber 15, having bellows sides and a rigid front 16, on which acontinuous pressure is exerted by the springs 17 17, secured to saidfront and to the standard, to act against the air forced into saidchamber.

Within the box is firmly secured In the extensions 9 9 is journaled thecrankshaft 1S, this shaftv being in line with the opening 6 in the frontof the box and being operated by a crank-handle inserted throughsaidopening and engaged with the crankshaft. On the crank of the shaftare pivoted the pitman-rods 19 and 20, which are pivoted at theiropposite ends to bearings on the rigid iiaps of the bellows 13 and 14and serve to operate these flaps alternately when the shaft is rotated.

The horn 21 has a curved-connection in the nature of a neck, which maybe engaged in the supply-channel 12, or the horn may be removed andplaced within the box when not 'in use.

When the crank-shaft is rotated, the bellows 13 and 14 are alternatelyoperated by the respective pitman-rods, thus collecting air and forcingthe same through the channels 10 and 11 into the chamber 15 andexpanding the same against the action of the springs 17 17, owing to thefact that the air is forced into this chamber more rapidly than it canescape through the channel 12, the intermittent action of the bellows onthe air being converted into a continuous pressure by the use of thechamber 15, so that a continuous supply of air is delivered through thechannel 12 to the horn.

By the use of the substantial central standard, solid except for theair-passages, the operating mechanism becomes more durable in itsaction, no leakage of air can occur by reason of the warping orwrenching of the standard, as when the standard is constructed ofseveral parts, and the bellows can be readily and securely mounted,while the cost of the apparatus is greatly reduced.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. In a fog-signal, the combination with a centralstandard formed of a solid block adapted to scrve as a support for theoperating mechanism, a springcontracted pressurechamber mounted on oneface of the standard, a plurality of bellows also mounted on saidstandard, air-supply channels formed in the standard connecting thebellows with the pressure-chamber, and a channel connecting thepressure-chamber with the opposite face of the standard, of mechanismfor operating the bellows mounted on the standard.

2. In a fog-signal, a solid standard having air-channels formed thereinand adapted to serve as a support and connector for the air collectingand distributing devices and for the operating mechanism therefor.

3. The combination with the box 5, the standard 8, mounted therein andhaving the extensions 9 9, and the channels 10, 11, and 12, a hornadapted to be connected with the channel 12, the bellows 13 and 14mounted at the sides of the standard, the chamber 15 mounted at thefront of the standard, and the springs 17 17 secured on the chamber, ofthe crank-shaft 18 journaled in the extensions 9 9, and the pitman-rods19 and 20 pivoted on the crank of said shaft and on bearings of thebellows-flaps, as described.

lVILIiIAM T. PURCHASE.

Witnesses:

THos. W. ANDREW, Il. J. MILLER.

